129951036 has 36 divisors (see below), whose sum is σ = 332186400. Its totient is φ = 42829248.

The previous prime is 129951007. The next prime is 129951037. The reversal of 129951036 is 630159921.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129951037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17076 + ... + 23483.

It is an arithmetic number, because the mean of its divisors is an integer number (9227400).

Almost surely, 2^129951036 is an apocalyptic number.

It is an amenable number.

129951036 is an abundant number, since it is smaller than the sum of its proper divisors (202235364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129951036 is a wasteful number, since it uses less digits than its factorization.

129951036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40658 (or 40653 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 129951036 is about 11399.6068353255. The cubic root of 129951036 is about 506.5160934914.

The spelling of 129951036 in words is "one hundred twenty-nine million, nine hundred fifty-one thousand, thirty-six".